package thread;

public class threadDemo13 {
    public static void main(String[] args) throws InterruptedException {
        Test t = new Test();
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                t.add();
            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                t.add();
            }
        });
        t1.start();
        t2.start();

        t1.join();
        t2.join();
        System.out.println(t.num);
    }
}

class Test {
    public static int num = 0;
    synchronized public static void add() {
        num++;
    }
}
